Table saw with part of the table swingably and laterally adjustable



y 1, 1952 A. ANDERSON 2,601,878

- TABLE SAW WITH PART OF THE TABLE SWINGABLY AND LATERALLY ADJUSTABLE IFiled March 8, 194 3 Sheets-Sheet 1 y 1952 A. L. ANDERSON TABLE SAW WITHPART OF THE TABLE SWINGABLY AND LATERALLY ADJUSTABLE 5 Sheets-Sheet 2Filed March 8, 1946 J JJ,

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DIW- July 1, 9 A. L. ANDERSON TABLE SAW WITH PART OF THE TABLE SWINGABLYAND LATERALLY ADJUSTABLE 5 Sheets-Sheet 3 Filed March 8, 1946 llllllldm% ?%d wa yhag Patented July 1, 1%)52 t A TABnE SAWWITH PART OF THETABLE SWINGABLY AND ILATERALLY ADJUST- ABLE Abner L. Anderson,Fairlield, Iowa, assignor to St. Paul Foundry & 'Manufacturing 00., St.Paul, Minn, a corporation of Minnesota Application March 8,1946, SerialNo. 652,846

1 I My invention relates to table saws.

One of the objects of my inventionis to provide an improved bench ortable saw in which the saw is mounted on amovable carriage and in whichimproved guide rails and rollers for' the saw carriage are provided.

Another object is toprovide improved means for securing the saw andcarriage against movement on the guide rails when it is desired to movethe work toward the saw instead of moving the saw toward the work. I Afurther object of my invention isto provide a bench or table saw inwhich a portion of the lateral sliding movement.

Another object isto provide an improved bench or table saw of themovable carriage type, capable of performing dado"work,"h'aving' anoperating member for operating the movable carriage which can beoperated from either end of the table.

table is mounted for swinging movementand for A (further object is toprovide an improved bench or table saw of the movable carriage typehaving means for adjusting the height of the saw, readily accessible foroperation from the front of the table when the carriage is drawnforward.

A further object is to provide a bench or table saw having an improvedmiter gauge. I

'Fig. 4 is an elevational view from the right of Fig. 1, parts beingremoved; .r

Fig. 5 is a vertical foreeand-aft sectional view showing the sawcarriage; i i

Fig. 6 is an enlarged view showing a portion of the motor mounting;

of the saw carriage and guide rails;

Fig. 8 is a detailed sectional viewshowingthe carriage clamp;

.Fig. 9 is an enlarged view showing the saw guard, the guard post andassociated parts;

Fig. 10 is a plan view of the saw guard;

Fig. 11 is a vertical transverse sectional view showing a portion of thetable in tilted position; Fig. 12 is a transverse sectional view showingthe saw used for dado work; and

i a l '45 Fig. '7 is a transverse vertical sectional view 3 Claims..(Cl.143132) Fig. 13 is an elevational view substantially on the lineIii-I3 of Fig. 1.

Referring to the drawings in detail, the construction shown comprises abench or table saw having a two-part work supporting table I, a rotarysaw 2 movable back and forth in slot 3 insaid table, a motor '4 for saidsaw, a fourlegged frame 5 for supporting the table, a carriage G mountedfor movement back and forth underneath the table, a pair of rails I and8 on which the carriage 6 is rollably mounted, a base 9 rockably mountedon said carriage on which base said saw and motor are mounted so as toraise or lower the saw with respect to the table, a crank wheel H] foreffecting rocking movement of the base 9, mounted on the carriage 6 andmovable therewith to a position where it is accessible to an operatorstanding at the front end of the table, and a push-pull rod ll securedto the carriage 6 and movable therewith and accessible to an operatorstanding at the front end of the table.

Carriage movement The guide rails I and 8 for the rolling carriage arecircular in cross section, as shown in Figs. '7

and 8, and are mounted in suitable brackets I2 secured to the end platesof the supporting frame. When a rail becomes worn, it may be angularlyadjusted in these supporting brackets to bring new lines of contact intoposition for engagement by the rollers 13 and M on the carriage byloosening the set screws I 5 and "turning the rails I and 8 slightly andthen tightening up the set screws 15.

The rail-engaging rollers l3 for one of the 'rails I include two pairsof rollers, the rollers of each pair straddling the rail 1 to hold thecarriage against transverse movement. The mounting for each pair ofrollers l3 includes a vertical shank l6 secured in an opening in thecarriage frame by means of a set screw l1 and two downwardly divergingjournal members on which "the rollers are mounted, respectively. It willbe seen that these rollers straddling the rail will hold the carriageagainst lateral movement.

In order to take care of any slight variations in the distance betweenthe two rails, the rollers M for engaging the other rail 8 are mountedso that their axes are horizontal, thus insuring engagement of the faceof the rollers with the rail regardless of any slight variations in thedistance apart of the rails l and 8.

It may sometimes be desirable to secure the carriagefi and the saw 2carried thereb against 'movement along the rails when it is desired toportion of the clamping ring is, and a' second clamping screw 28 havinga threaded engagement with the lower portion of the clamping ring l8 andhaving its point engageable with the lower side of 3 the guide rail 5. Alook nut 2| may be provided for holding this clamping screw in adjusted-po.

sition. Since the clamping screw. [9 has threaded engagement both withthe carriage frame and the clamping ring clamping screw does not effectany vertical adjustment of the clamping ring but does cause engagementor disengagement of the point of the clamping screw IS with the guiderail. The lower clamping screw 25! may be adjusted and set so that itbarely clears the lower side of the guide rail as the carriage is movedback and forth. When it is desired to secure the carriage againstrolling movement, the upper screw I9 is tightened down, causing thepoint to engage the upper side of the guide rail 7 and clamp the guiderail between the pointsof the two opposed screws i 9 andZll. The saw isdesigned to take care of "either (1) sawing the pieceof wood completelyin two, or (2) cutting dadoes, in which operation grooves are out in thewood without sawing thepiece' completely in two. Where the piece is tobe sawed completely in two, a saw guard 22 (Figs. 2, 9 and is securedin-place to shield the upper portion of the saw, this saw guard beingsecured to the rollablesaw carrying carriage '5 and provided with ahandle 23 by means of which the saw carriage may be moved back and forthto move the saw into and out of engagement with the piece to be sawed.This guard 22 is mounted on a thin guard post 24 which is mounted on aguard sup- &

port 25 secured to the rollable carriage 5. The post 26. is thin enoughto enter the kerf formed by the'saw so as not to interfere with thefeeding movement of the saw carriage. Thehandle-guard may be adjustedvertically to take care of dif- .ferent thicknesses of board. ordifferent sizes .of

saws by means of a clampingbolt 25 which passes through registeringopenings in the guard 22 and also through avertical slot 28 in the guardpost 24. By loosening the hand nut 29 on the bolt 25, the guard 22 maybe moved to the desired position of vertical adjustment and then securedby tightening up the nut. The post 2% may be detachably secured to thesupport 25 by means of a cap screw 30 extending through a hole in thesupport 25 and threaded into the post 24.

For dado work, the guard post 24 and guard 2-2 are removed from theguard support 25, the saw is adjusted vertically by means of the handwheel H] to cut the desired depth of groove orrabbet in the under faceof the board, the board is .plaoed and held in position and the carriage5 and saw 2 are shifted along the rails 'l andv 8 by means of the pullrod l l to cut the desired groove 31 in the bottom face-of the board 32(Fig. 12) Any usual or suitable set of dado cutters 33 maybe secured onthe saw shaft 34 tocut any desired shape of groove.

The pull rod II for operating the rollable carriage 6 may be mounted onsuitable brackets 35 I8, turning movement of theextending laterally andupwardly from the carriage frame 5. The pull rod may be provided with adetachable handle 35 which may be se cured selectively at either end ofthe pull rod ll ,so that the carriage 6 may be operated either from thefront or rear of the table as desired. For this purpose, the pull rodmay be made tubular to receive the end of the handle which may besecured in either end of the tubular pull rod by means of asuitableclamping screw 31.

Saw adjustment The vertical adjustment of the saw is effected by meansof the hand wheel in mounted on the carriage '-6, which hand wheel is somounted that when the carriage is pulled forwardly, the hand wheel willbe in convenient position for operation by one standing at the front ofthe table, as shown in dotted lines in Fig. 2.

The saw 2 and the motor 4 for driving the saw are mounted on a base orsupport 9 which is rockably mounted at 38 on the rollable carriage 6.This support 9 comprises a bracket 39 on which the bearings 40 for thesaw shaft 34 are mounted, and amotor support 4| on which the motor basesupport 42 for the drive-motor 4 ismounted. In order to secure theproper tension in the drive belt 63 between the motor pulley 44 and thepulley 45 on the saw shaft 34, the motor base support 42 is madelongitudinally "adjustable on the motor support 4| by means of aclamping bolt 48 and nut 4"! (shown in Figs. 2; 5 and 6). The motor basesupport 42 is provided with a slot 48 through which the shank of thebolt 4-6 extends, and the bolt 46 extends through a hole in the motorsupport 4!. A thumb screw 49, threaded in the motor support 41, may beprovided to limit adj'ustably the downward movement of the motor basesupport 42.

The rocking adjustment of the saw 2 and motor 4 is effected by means ofa shaft 50 rotatably mounted in a suitable bearing bracket 5! onv thecarriage 6 to which shaft the hand wheel 10 is secured. This shaft isthreadedinto a nut 52 which is trunnioned on a bracket '53 formed on theswinging support. A universal joint 54 in the shaft may be provided totake care of the change in position of the shaft due to the swingingmovement of the motor support. A sawdust chute 55 (Figs. 5 and 9) may beprovided extending up over the lower portion of the saw 2for deliveringthe sawdust from the saw. 7

Table adjustment The table I is made in two sections 55 and 5'1 (Figs.1, 3 and 4), one section 56 being fixed and the other 51 being tiltableto enable the making of bevel edges and also adjustable laterally toprovide space between the two sections for the passage of a dado set.

To provide for the tilting of the table, a pair of brackets 58 and 59(Fig. 2) are used, mounted on the end plates 60 of the frame 5 forarcuate movement about the upper edge'of the'tiltable table section. asan axis as shown in Fig. ll. The swinging table section 5'! is mountedfor lateral sliding movement on these brackets. For the tilting orarcuate movement of the brackets. 58 and 59 they are each provided withan arcuate guideway 60 engaging a pair of spaced guide pins orprojections Bl, equidistantfrom theslot 3 and secured to the end plates.For securing the brackets58 and 59 in adjusted position, each isprovided with a slot 52, concentric with the guideway Gil andextendingrthrough the bracket through which slot extends a hand clampingscrew 63 threaded into the end plate.

The table section 51 is mounted for lateral sliding movement on thesebrackets 58 and 59 by means of a pair of screws 64 which extend througha pair of slots 65 on a supporting angle 66 secured to the lower face ofthe table section 51. With this construction, the space between thetable sections may be adjusted by loosening the clamping screws 64,moving the table section 51 laterally to the desired position andtightening up the clamping screws, as shown in Figs. 3, 4 and 12. Thisadjustment is sufficient to enable the removal and replacement of thevarious rotary saw blades 2 and dado sets 33 which may be secured on theleft-hand end of the saw shaft 34 by means of the nut 66 In order toperform miter cuts on the boards, a pair of miter blades 61 and 68(Fig. 1) are provided, one on each table section. blade is pivotally andadjustably mounted at 68 on a miter arm 69 which in turn is laterallyadjustable on the table. For effecting this lateral adjustment, themiter arm is provided with a slide 10 which moves in a slideway H in thetable section. A locking screw 12 (Fig. 13) is provided for holding theslide 10 and miter arm 69 in any position to which they may be adjusted.The miter blades 67 and 68 may be set and clamped in any desiredadjusted position by means of a 0 look screw 73 which extends through anarcuate slot 14 in the miter arm. A suitable indicating scale 15 isprovidedfor indicating the angle of adjustment. 1

Further modifications will be apparent to thos skilled in the art and itis desired, therefore, that the invention be limited only by the scopeof the appended claims.

Having thus described my invention, what .I claim and desire to secureby Letters Patent is:

1. A table saw comprising a rotary saw shaft on which may be mountedeither a circular saw or a set of dado cutters, and a table having twoparts spaced apart to provide a clearance slot for the passage of thesaw or dado set therebetween, means including arcuate guide means formounting one of said table parts for pivotal movement to swingdownwardly independently of the other table part from a horizontalposition substantially about the upper edge of the pivotally mountedtable part side of the saw clearance slot as an axis to maintain theupper edge of the clearance slot at a constant height and at a constantdistance from the saw during the swinging movement and means formounting said pivoted table part to move toward and away from said axisto provide proper clearance for either the saw or the dado cutters.

2. A table saw comprising a rotary saw shaft Each miter table part froma horizontal position substantially about the upper edge of thepivotally mounted table part side of the saw clearance slot as an axisto maintain the upper edge of the clearance slot at a constant heightand at a constant distance fromthe saw during the swinging movement andmeans for mounting said pivoted table a part to move toward and awayfrom said axis to provide proper clearance for either the saw or thedado cutters.

3. A table saw comprising a saw blade and a table having two partsspaced apart to provide a clearance slot for the passage of the sawtherebetween, one of said table parts being mounted to lie in agenerally horizontal position, and means including arcuate guide meansfor guiding the other table part for pivotal movement to swingdownwardly independently of the other part from a horizontal position,substantially about the upper edge of the swingable table side of thesaw clearance slot as an axis, to maintain the upper edge of theclearance slot at a constant height and at a constant distance from thesaw during its swinging movement and means for mounting said swingabletable part to move radially toward and away from said axis to vary thewidth of the slot.

ABNER L. ANDERSON.

REFERENCES CITED UNITED STATES PATENTS Number Name Date Re. 7,871Nichols Sept. 4, 1877 179,944 Nichols July 18, 1876 707,675 Colburn Aug.26, 1902 1,336,799 'Vaughan Apr. 13, 1920 1,789,125 Wilderson Jan. 13,1921 1,762,023 Longenecker June 3. 1930 1,763,478 Palmeter June 10, 19301,813,435 Bentz July 7, 1931 1,872,718 Flanigan Aug. 23, 1932 1,988,102Woodward Jan. 15, 1935 2,062,969 Dutcher Dec. 1, 1936 2,185,304 KnappJan. 2, 1940 2,247,314 Sellmeyer June24, 1941 2,406,514 Squire Aug. 27,1946

